Type mold



NOV- 21, 196 E. E. BENDIX 3,009,563

TYPE MOLD Filed Sept. 25, 1959 5 Sheets-Sheet 3 II2 I22 INVENTOR EUGENE E. BENDIX ATTORNEYS E. E. BENDIX Nov. 21, 1961 TYPE MOLD 5 Sheets-Sheet 4 Filed Sept. 23, 1959 FIGS.

FIG..9.

FIGJI.

INVENTOR EUGENE E.BENDIX Patented Nov. 21, 1961 dice 3,009,563 TYPE MOLD Eugene E. Bendix, Philadelphia, Pa., assignor to Langsion Industries, Incorporated, Philadelphia, Pa., a corporation of Virginia Filed Sept. 23, 1959, Ser. No. 841,713 22 Claims. (Cl. 199-91) This invention relates to molds for type casting machines, such as are sold under the trademark Monotype.

Molds of this type are constructed with a pair of type blocks mounted above a base plate, and with the type blocks defining therebetween a space for a reciprocable mold blade. A cross block is provided, to be moved across the front faces of the type blocks to alternately close and open the mold cavity defined by the mold blade, the type blocks, and the cross block. An exemplary construction is disclosed in the Knight Patent No. 1,219,956.

As is understood, it is of utmost importance that the type blocks, mold blade and cross block be machined with considerable precision and be accurately positioned in the mold in order for the mold to perform satisfactorily. In this connection, it has previously been the practice to provide squaring or positioning blocks permanently mounted in fixed position above the base plate, vand to the rear of the type blocks, these squaring blocks providing fixed, square, reference surfaces against which the rear faces of the type blocks are positioned to effect correct alignment and positioning of the front face of each type block.

The squaring blocks are arranged in fixed permanent position in the molds, as indicated, since they provide the fixed reference surfaces. Thus, if the type blocks have been machined so that they are somewhat oversize, as determined from positioning the type blocks against the squaring blocks and taking measurements, the type blocks will then be remachined until they are the proper size. However, in the event that the type blocks are machined to such an extent that when positioned against the squaring blocks it is determined that they are undersize, such type blocks can no longer be used, and must be scrapped, With the consequent loss of time, effort and material.

Another disadvantage of prior molds is that the length of the mold blade engaged and supported by the type blocks is limited, inasmuch as the front-to-rear dimension of the type blocks is limited due to the presence of the squaring blocks. In other words, the squaring blocks occupy space on the [base plate, which, if it were otherwise occupied by the type blocks would permit the type blocks to be constructed of a considerably greater frontto-rear dimension whereby the mold blade could be advantageously engaged and supported by the type blocks throughout a substantially greater length of the mold blade. As is understood, the squaring blocks are not normally positioned so that they engage the mold blade.

Accordingly, an important object of the invention is to provide a novel mold, of the character referred to, designed to eliminate these and other disadvantages. Among other things, the molds of the present invention include novel means providing for accurate and precise positioning of the type blocks without requiring the use of squaring blocks. Such means is designed to facilitate such positioning regardless of Whether the type blocks are initially oversize or undersize. A related object resides in the provision of novel type block positioning structure adapted to eliminate the necessity for remachining the type blocks if they are initially somewhat oversize, and also adapted to enable undersize type blocks to be utilized.

A somewhat more specific object is to provide novel structure in molds, of the character referred to, providing for adjustment of the type blocks and positioned in the mold between the base plate and the type blocks so as not to limit or restrict the front-to-rear dimension of the type blocks, whereby this dimension may be made greater to provide better support for the mold blade, as discussed above. Thus, molds of the invention may advantageously include unitary type blocks in intimate engagement with the mold blade throughout a substantial portion of the length of the mold blade.

As is understood, molds of the type under consideration are subject to high temperatures, as a result of the hot metal being handled. These changes in temperature do not always result in uniform expansion and contraction of the various parts of the mold. Thus, it was necessary in prior molds to make adjustments, during use, in order for the mold to operate properly. These adjustments usually involved adjustment of the gib or front abutment plate which engages the cross block on the side thereof opposite from the type blocks. Such adjustments are also necessary, from time to time, to compensate for wear. These adjustments are time-consuming, and furthermore, if needed, there may be undesirable consequences, such as damage to the structure of the mold, imperfectly cast bodies, shutdowns, repairs, etc.

Some suggestions have been made in the past to minimize the number of these adjustments necessary in the operation of the molds. However, it was still necessary to make frequent and time-consuming adjustments for the cross block.

Thus, another important object of the invention is to provide a novel means in molds, of the type referred to, adapted to satisfactorily eliminate the need for any adjustments for the cross block, and to maintain uniform and proper contact pressure between the cross block and the type blocks over long periods of use. A related and more specific object resides in the provision of a novel cross block construction including a yieldably mounted roller engaging the front abutment plate or gib and operating to continuously urge the cross block against the type blocks under a uniform and desired pressure.

It is also a further object to provide a novel mold blade construction of uniform thickness and adapted for the casting of both high and low quads.

A still further object is to provide novel means in molds, of the type referred to, providing for correct and proper seating of the mold in the casting machine. In the illustrative embodiment of this aspect of the invention, to be described in detail herein-below, this means is in the form of positioning buttons removably arranged in the base plate, and adapted to eliminate the necessity for machining the bottom surface of the base plate of the mold within close tolerances.

An additional object resides in the provision of novel means for lubricating the mold blade and cross block and novel means for cooling the mold during operation.

Other objects of the invention relate to the novel combinations, structures and arrangements, as will be do scribed in more detail hereinbelow, providilw an improved and durable mold construction, capable of superior performance, and less expensive to construct and maintain in operation.

Further objects and advantages of the invention will be in part obvious and in part pointed out hereinafter.

The novel features of the invention may be best made clear from the following description and accompanying drawings in which:

FIGURE 1 is a perspective view the invention and shown trative purposes;

of a mold embodying partially broken away for illusthey are not made when.

FIGURE 2 is a perspective view of the mold of FIG- URE 1 show in vertical section and with certain structure removed, the cutting plane being indicated generally by the line 2-2 in FIGURE 1;

FIGURE 3 is an exploded perspective view of one ernbodiment of the novel structure used for positioning the type blocks in the mold;

FIGURE 4 is a top plan view of the mold of FIGURE 1, with the mold blade and certain other structure removed and with the cross block shown in horizontal section, the cutting plane being indicated generally by the line 4-4 in FIGURE 8;

FIGURE 5 is an enlarged and fragmentary sectional view taken generally along line 55' of FIGURE 4;

FIGURE 6 is an enlarged end elevational view of the squaring plate shown in FIGURE 5;

FIGURE 7 is an enlarged and fragmentary end elevational view of the squaring plate taken by looking in the direction of arrow 7 in FIGURE 3;

FIGURE 8 is an enlarged elevational view of the front side of the cross block, with some structure omitted for convenience of illustration;

FIGURE 9 is an enlarged Side elevational view of a novel mold blade construction of the invention;

FIGURE 10 is a top plan view of the mold blade, with the parts thereof shown in a different position from that shown in FIGURE 9;

FIGURE 11 is a fragmentary and enlarged vertical sectional view through the base plate of the mold of FIG- URE 1 and showing an allustrative embodiment of the removable positioning buttons referred to;

FIGURE 12 is a top plan view of the right-hand type block shown in FIGURE 3;

FIGURES l3 and 14 are opposite side elevational views of the type block of FIGURE 12;

FIGURE 15 is an end elevational view of the type block of FIGURE 12;

FIGURE 16 is a top plan view of the left-hand type block shown in FIGURE 3;

FIGURE 17 is a sectional view taken along line 1717 of FIGURE 16; and

FIGURE 18 is a sectional view taken along line 1818 of FIGURE 17.

Referring now to the illustrative embodiment of the invention shown in the drawings, it will be seen that the mold, generally indicated by numeral 20, includes a baseplate 22, type blocks 24, 26, a mold blade 28, a cross block 30, a gate pusher cam 32 mounted in the usual manner in fixed position on the base plate for engagement in the bottom of the cross block channel, and a front abutment plate or gib 34, all constructed for molding operations as set forth in the Knight patent, referred to above, the disclosure of which is hereby incorporated herein by reference insofar as it contributes to the understanding of the type of mold to which the present invention is applicable.

The type blocks 24, 26 are mounted above the baseplate and include opposed, lateral faces 36, 33, respectively, in intimate engagement with the mold blade and front faces 40, 42 in intimate engagement with a lateral face 44 of the cross block.

As indicated hereinabove, molds of this type had previously been designed with squaring blocks mounted in fixed position above the base plate and to the rear of the type blocks, for the purpose of enabling the type blocks to be accurately positioned and aligned, as disclosed in the patent referred to above and also the Indahl Patent No. 2,029,529. The use of such squaring blocks involved certain disadvantages and drawbacks such as those noted above.

In the present invention, novel means are provided between the base plate 22 and the type blocks 24, 26, for effecting and providing for adjustment of the position and alignment of the type blocks. As best seen in FIG- URES 1, 2, 3 and 5, this means in the illustrative embodiment of the invention includes a squaring plate 46 suitably mounted in fixed position on the base plate 22 as by bolts 48 extending through counterbored holes 50 in the base plate and threaded into holes 52 in the squaring plate, as shown in FIGURES 3 and 5. The squaring plate preferably extends from approximately the rear face 54 of the base plate forwardly to a point adjacent the middle of the base plate. An inclined or oblique groove 56 is formed in the top of the squaring plate 46 for the reception of a key 58.

"this key, as best seen in FIGURES 2 and 3, includes an oblique lower portion 6ft designed to be slidably received in the groove 56, portion 60 being complementary in cross-section to the groove 56. Formed on top of and joined to portion 60 are two spaced and separated sections 62, 64. These sections 62, 64 are shown as being flat and coplanar, in direct alignment, and of the same transverse sectional configuration. When portion 60 of key 58 is mounted in groove 56 in the squaring plate, sections 62, 64 extend in a direction parallel to the longitudinal axis of the squaring plate, and are also parallel to the rear face 54 of the base plate 22, as will be apparcut.

The bottoms of the type blocks 24, 26 are formed with transversely extending grooves 66, 63 respectively. These grooves 66, 68 are complementary in cross section to the sectional configuration of sections 62, 64 of the guide key and are adapted to be engaged thereover, in sliding contact therewith. It should be noted that the grooves 66,

8 in the type blocks 24, 26 are located at the same distance from the front faces 4-0, 42 of their respective type blocks for a purpose that will be apparent as the description proceeds.

Adjacent either end of the groove 56, in the squaring plate 46, there is formed a horizontally extending counterbored hole 70, including a threaded inner portion 71, in which is mounted an adjusting screw 72. Holes 70, 71 extend in directions parallel to the plane of the face 74 of the squaring plate, the hole at one end of the slot being offset from the hole at the other end, as will be apparent.

As shown, the holes 70 will be so positioned and formed that the head of the adjusting screws 72 will be able to project into the groove 56 through cut-out portions in the end thereof to engage the adjacent end of the key 58, as best seen in FIGURES 1 and 3, whereby upon adjust ment of these screws 72 the guide key 58 will be moved in the groove 56. It will be appreciated that by reason of the construction of the guide key 58 and groove 56, the sections 62, 64 of the guide key will always extend in a direction parallel to the longitudinal axis of the squaring plate, or, stated differently, in a direct perpendicular to the front-to-rear direction of the mold, irrespective of the position of the key 58. The key 58 will be of a sufficient length so as to be engaged at either end thereof by the screws 72 arranged at opposite ends of the groove 56.

An exemplary manner for assembling the type blocks and squaring plate in the mold will now be described. The squaring plate will be secured in correct position by bolts 48, the diameter of holes 50 in the base plate being shown as slightly larger than the diameter of bolts 48 to facilitate proper alignment of the squaring plate on the base plate. One of the blocks 24, 26, say block 24, will then be positioned on the squaring plate 46 so that the groove 66 in the bottom of this block will be in engagement with and receive the section 62 of the guide key 58, the bottom surface of the type block resting on the top of the squaring plate and the front face 40 of the type block being disposed forwardly of the front face 74 of the squaring plate. Measurements may then be made, for example, between the front face of the type block and the front face of the squaring plate to determine the correct position in the mold of the front face 40 of the type block, as will be understood. In connection with effecting this precise positioning of the front face of the type block, the adjusting screws 72 will be appropriately manipulated to move the section 62 of the guide key toward or away from the front face '74 of the squaring plate. As is evident, this movement of the section 62 will result in corresponding movement of the front face 4% of the type block. And, to assure proper positioning of the lateral side face 80 of the type block, measurements may be made, for example, between that face and the corresponding face 83 of the baseplate. As will be appreciated, once the correct position of key 58 has been determined and fixed in the squaring plate, the type block may be slid or moved along the axis of the section 62. and in a side-tside direction in order to bring its side faces 36, 80 into proper position.

As soon as the correct positioning of the front face 40 of the type block is determined, the adjusting screws 72 will be tightened to retain the guide key 58 in this position. Likewise, after the lateral positioning of the type block 24 has been effected, the type block will be secured to the baseplate, as by bolts 82 extending through counterbored holes 84 in the type blocks, and threadedly engaged in holes 52 in the squaring plate 46. The counterbored holes 84 in the type block will be larger than the diameter of the shank of the bolt 82, in order to permit adjusting movements of the type block, as indicated in FIGURE 5. It will be noted that the holes 84 in the type block 24 are shown as being coaxial with the corresponding holes 59, 52 in the baseplate and squaring plate, respectively, thus minimizing the number of holes required in the squaring plate for connection to the type blocks and baseplate. This also applies to the holes 86 in the type block as.

The mold blade 28 will then be engaged against the lateral face 36 of the type block 24, for example, in the position shown in FIGURES l and 2. The mold blade will rest on the squaring plate and the projection 47 thereon, the blade being disposed on portion 60 of the guide key between the sections 62., 64. Type block 26 is then arranged on the squaring plate 46 with the section 64 of the guide key being engaged in the groove 63 in the bottom of the type block. This block will then be moved into proper position against the mold blade 28. This may be done, for example, by means of a screw 87 screwed into a threaded hole in squaring plate 46, as indicated in FIGURES 3 and 4, with its head shown as abutting against the vertical face 89 of a transverse recess in block 26.

Thus, the correct positioning of lateral face 38 and front face 42 of the type block 26 will be automatically determined. In this connection, it should be noted that the type blocks 24, 26 and mold blade 28 usually are all initially machined together, so that the front faces 40, 42 of the type blocks will be in precisely the same plane after these blocks have been assembled in the mold, in the manner just described.

The type block 26, once it has been so positioned, will be securely engaged to the squaring plate, as by bolts 82 arranged in holes 86 and threaded into holes 52 in the squaring plate, as previously discussed in connection with type block 24-.

Cover plates 37, $55 are shown attached to the type blocks, as by screws 9% extending into threaded holes 92 in the type blocks. Plate 37 covers the mold blade 28 to hold the latter against vertical movement and it includes a rearward projection 94, as shown. A suitable mold blade stop 96 is secured to the rear face of type block 24 for engagement with the mold blade 28, as will be seen in FIGURES l, 2 and 4 and discussed in more detail hereinbelow.

Suitable structure is shown in FIGURES 3 and 7 as being provided at one end of the front face 74 of the squaring plate 46 for receiving the slugs of metal cut from the type bodies and ejected from the mold.

As discussed hereinabove, it is necessary in molds currently in use to make frequent and time-consuming ad justments of the gib or front abutment plate to compensate for wear, unevenness in expansion and contraction of the parts due to temperature changes, etc. Furrthermore, even after such adjustments were made, it was still difiicult to assure full and proper contact pressure between the cross block and the type blocks. And, in the event that for some reason the pressure of the molten metal being injected in the cavity of the mold were excessively high, this condition could result in substantial damage to various parts of the mold, or to misalignment and malfunctionin According to the present invention, the cross block 30 is provided with a roller, spring urged into engagement with the gib 34, and adapted to continuously exert a uniform contact pressure between the cross block 30 and the type blocks 24, 26. In the illustrative embodiment shown in the drawings, this roller is identified by numeral 98 and is disposed in a recess or cavity 190 provided in the body of the cross block, as indicated in FIGURES 2, 4 and 8. The roller 98 may be made of any appropriate material and it is journalled on a vertical shaft 102 extending between the top 104 and bottom The walls of the recess 1%. Shaft 102 is carried by a rocker arm in the form of a yoke 108, being mounted in the upper I10 and lower 112 legs thereof, as indicated. The yoke 108 is mounted for pivotal movement in the cavity by means of a pivot pin 114 extending through the web 116 of the yoke, and being arranged in the top 104 and bottom 10'6 walls of the recess 100, as seen in FIGURES 4 and 8. Thus, the yoke 168 is swingable or pivot able about the axis of pivot pin 114-. Inasmuch as the roller 98 and shaft 102 are carried by the yoke 108, pivotal movement of the yoke will also result in a corresponding movement of the roller 98 and shaft 102 toward or away from the gib 34.

As best seen in FIGURE 4, a compression spring 118 is arranged to continuously urge the yoke 1% to pivot outwardly toward the gib 34. Spring 113 is mounted in blind holes in yoke I98 and in the cross block 30 as shown, and normally urges the web 122 of the yoke outwardly toward the gib 34.

Thus, it will be seen that the spring 118 will operate to continuously urge the roller 98 into engagement with the gib 34, whereby a satisfactory spring pressure will be exerted on the roller 98 to in turn maintain satisfactory contact pressure between the cross block and type blocks.

An aperture 128 is shown as being provided in the top Wall 104 of the cross block for communication with a hole 130 in the shaft 162 to permit lubricant to be fed to the bearings 1'32 for the roller 98. These bearings 132 may be of any suitable construction. As shown, they are of small cylindrical shape mounted between the roller 98 and the inner member 134, the latter being provided with passageways 136 communicating with the hole 130 in the shaft through a radial passageway 138 in the shaft.

By reason of the construction and arrangement of the roller 98 and its mounting in the cross block, as described above, the cross block will be continuously urged into complete and full intimate contact with the front faces 40, 42 of the type blocks 24 and 26. Thus, any unevenness in expansion or contraction of the parts occurring during operation will be compensated for by the movements of the roller 98 either inwardly or outwardly relative to the cross block. The arrangement of the spring urged roller 98 at about the longitudinal midpoint of the cross block 30 assures optimum contact pressure between the cross block and the type blocks, at all times.

It should be observed that if the pressure of the molten metal in the mold cavity accidentally becomes excessively high, the cross block 30 will be yieldable away from the front faces 40', 42 of the type blocks, so that the excess metal may flow freely between the cross block and the type blocks, and the mold will not be damaged. If this condition arises, the cross block may then be conveniently removed for cleaning of the mold, and later conveniently reinstalled, as will be evident.

The novel mold blade construction is best seen in FIG- URES 2, 9 and 10. As there shown, the blade 28 is composed of an upper section 142 and a lower section 144. These sections are of uniform thickness, and are arranged in the same vertical plane, as indicated. The lower section 144 is formed with a cut-out portion 145 therein and in which the upper section 142 is mounted whereby these sections are reciprocable relative to each other.

A latch shown in the form of a bell crank lever 146 for detachably holding the sections 142, 144 in a normal operating position is pivoted to the rear of the upper section 142 by suitable means. As shown, a pin 148 extends through latch 146 and the section 142 to fasten the two together. A torsion spring 150 is arranged around this pin 148, with one end of the spring being retained in the upper section 142, and with the other end of the spring being engaged around the vertical arm 152 of the latch 146, as indicated.

A lug 154 is formed at the free end of the horizontal arm 156 of the latch, this lug being disposed in a notch 158 in the cut-out portion 145 of the lower blade section, when the blade sections are in the normal positions thereof shown in FIGURE 2. When the latch is in this position, the blade sections 142, 144 will move back and forth together, for normal casting operations, as will be apparent. Torsion spring 154 will operate to retain the latch in this position.

A slot 160 is formed in the top of the upper blade section 142, and the mold blade stop 96 extends through this slot, to limit the movement of the mold blade, as will be understood. This stop 96, as best seen in FIG- URES 1, 2 and 4, may be in the form of a bar extending across the rear faces of the type blocks 24, 26 and removably secured to block 24, by screw 162 engaged in threaded hole 163 in the block 24 (see FIGURE 17).

When it is desired to case a low quad or short type body, the latch 146 will be pivoted counterclockwise, as viewed in FIGURES 2 and 9, and against the action of spring 151 so as to remove the lug 154 from the notch 158 and dispose it in a recess 164 formed in the upper section 142, as indicated in FIGURE 9. This movement of the latch 146 may be effected automatically by any suitable structure (not shown) controlled from the record strip, as will be understood. A lug 166 is shown as extending horizontally from the lower end of the vertical arm 152 of the latch, and means (not shown) may be provided for engaging this lug to move the latch against the action of spring 150, to dispose the latch in the position thereof shown in FIGURE 9. When the latch is in this position and the lower mold blade section 144 is retracted, as indicated in FIGURE 9, it will be evident that the mold blade will be arranged for the casting of low squads or short-body types, as discussed, for example, in the patent to Eschinger No. 857,728, the disclosure of which is incorporated herein by reference.

To convert the mold blade to its condition for normal casting operations, spring 150 will be allowed to return lug 154 of the latch into the notch 158, after the lower blade section 144 has moved to a forward position, whereupon when the mold blade is retracted, sections 142 and 144 will move together, as will be apparent.

Similar grooves 163, 170 are shown as being similarly formed in both faces or sides of the upper 142 and lower 144 mold blade sections, communicating through holes 172, 174 for the passage of lubricant, as will be referred to again hereinafter.

The lateral faces 36, 38 of the type blocks 24, 26 are respectively formed with recesses 176, 178 therein adjacent the upper rear regions thereof, in order to accommodate the latch construction on the mold blade, as best seen in FIGURES 4, l2 and 16.

The mold blade will be actuated by suitable structure 0 (not shown) operating in the hole 180 formed in the lower section 144, as will be understood.

Thus, it will be seen that the sectioned mold blade 23 and latch arrangement are of simplified construction, and adapted to be conveniently converted to cast low quads. Furthermore, the blade will be desirably supported throughout a substantial portion of its length by the opposed lateral faces 36, 38 of the type blocks 24, 26.

In order to facilitate proper positioning of the mold 20 in the casting machine, it is contemplated that removable positioning buttons be provided in the base plate 22, as shown in FIGURE 11. A plurality, for example three or more, of these buttons 182 will be utilized, the buttons preferably being of solid cylindrical construction, as indicated. The base plate is shown as being provided with counterbored holes 184 at suitable locations therein, and the buttons 182 will be fitted into and frictionally retained in the larger bore, resting against the radial shoulder of the hole, and projecting outwardly from the bottom surface of the base plate the necessary distance for correct positioning of the mold, as will be understool. These buttons may be conveniently removed by inserting a tool or other appropriate instrument into the smaller bore and pushing the buttons out of their sockets.

The invention also contemplates the provision of novel means for lubricating the mold blade and for cooling the mold. Referring to FIGURES 2, 9, l0 and 12-15, it will be seen that the illustrative embodiment of the means for lubricating the mold blade includm a lubricant well or reservoir 200 arranged at the right hand end of the type block 26, and a passageway 204 leading from this well to an outlet 206 opening into an enlarged recess 248 which, in turn, opens into the space defined between the type blocks and in which is mounted the mold blade. As best seen in FIGURE l3, a fluid-pervious padding material 210 is arranged in recess 208 and of a height shown as being only slightly less than the height of the mold blade. This padding 210 may be made of felt or any other suitable substance, and it will operate to deliver lubricant from the well 200 and passageway 204 to the face of the mold blade as the latter moves back and forth during operation of the mold. Grooves 168, and holes 172, 174 in the mold blade are designed to distribute the oil on both faces of the mold blade, as should be evident, to effect optimum lubrication of the blade as the latter reciprocates, in the space between the type blocks.

A passageway 212 is shown in FIGURE 12 and communication with and branching olf passageway 204 and opening into a recess 214 formed in the face 42 of type block 26. A fluid-pervious material 215, for example, felt padding, is shown in FIGURE 15 as being arranged in this recess 214 for delivering lubricant from the well 200 to the face 44 of the cross block 30.

An exemplary embodiment of the cooling system for the mold will now be described, with reference being made particularly to FIGURES 3, 6 and 1218. As shown in FIGURE 3, the squaring plate 46 is provided with two passageways for cooling fluid. These passageways are identified by numerals 220, 222 and they extend in parallel directions inwardly from the left face of the squaring plate. Closure plugs 224 are shown threaded into the open ends of these passageways sealing the same, and the other ends terminate or are located within the squaring plate, as indicated. It is contemplated that cooling fluid, for example, water, be passed through these passageways and the type blocks in series ilow.

As shown in FIGURE 3, a hole 26 extends from the bottom of the squaring plate 46 upwardly, opening into the right hand end of passageway 222, hole 226 being adapted to be in communication with a duct means or passageway (not shown) in the base plate 22 when the squaring plate is mounted thereon. Another hole 228 is also formed in the squaring plate, extending therewith a through, and shown as having a counterbored upper end. Hole 228 is shown in general transverse (front-to-rear) alignment with hole 226, and will likewise communicate suitable duct means or passageway (not shown) in the base plate when the squaring plate is mounted thereon.

Passageway 222 opens into an upwardly extending counterbored hole 230, while spaced counterbored holes 232, 234 are shown as extending down from the top of the squaring plate into the passageway 220.

The type block 26 is formed with an inclined passageway 236 therein (see FIGURES 12-14) adapted to be placed in communication with hole 228 when this type block is secured in position on the squaring plate 46. The upper end of passageway 236 opens into a horizontal passageway 238 appropriately sealed at one end as by a plug 240 (FIGURE 14), and terminating at its other end within the upper end of an enlarged blind hole or bore 242 located in the left corner of the type block adjacent surface 42. This hole 242 is threaded at its lower end, as indicated, for a purpose to be explained hereinafter, and is adapted to communicate with hole 234 when the type block is mounted on the squaring plate.

A bore 244, corresponding to bore 242, is provided in the right corner of type block 24 adjacent surface 49 (see FIGURES 16-l8) and is adapted to communicate with hole 232 when the type block is mounted in position on the squaring plate. An inclined passageway 246 is formed in type block 24, as best seen in FIGURE 18, being suitably sealed at one end as by plug 248 and opening into the top of bore 244 at the other end. Another inclined passageway 250 is formed in block 24, extending downwardly from passageway 246 and opening into a vertical bore 252, as shown in FIGURE 17. The lower end of passageway 250 is shown sealed off by plug 254. Bore 252 will be in communication with hole 236 when the type block 24 is secured in position on thesquaring plate.

Thus, it should be evident that there is provided a path for the flow of cooling fluid, in series through the squaring plate, the type blocks and back to the squaring plate. Either hole 226 Or 228 may constitute the inlet for flow into the squaring plate and type blocks and be connected through the communicating hole in the base plate to an appropriate source of cooling fluid (not shown), while the other of holes 226, 228 will constitute the outlet for flow from the squaring plate through the communicating hole in the base plate. Considering hole 226 as the inlet, flow will be through passageway 222, into the type block 24, through bore 244, into passageway 22ml), up through hole 234 into bore 242 of type block 26, through this type block, and out passage-way 236 and into hole 228. If hole 228 is the inlet, the flow obviously will be reversed.

In any event, it has been found that the position, size and arrangement of the various passageways and bores in the mold and constituting the cooling system provide for highly satisfactory heat exchange and assure proper functioning of the mold. The enlarged bores 242, 244 are located adjacent the mold cavity, and by reason of their size and location, they will permit suflicient coolant to pass therethrough to prevent any undesirably high temperatures in the mold.

Any suitable pumping arrangement or the like may be utilized for passing the cooling fluid through the cooling system. Appropriate fluid sealing means will be provided in the interfaces between the base plate and squaring plate, and between the squaring plate and type blocks, in the regions surrounding the communicating holes and passageways in the cooling systems, as will be understood. For example, sealing rings (not shown) may be arranged in the counterbored sections of holes 228, 230, 232 and 234 for tight sealing engagement in the opposed surfaces when the type blocks are mounted in position on the squar ing plate. And, as indicated in FIGURE 18, an apertured plug 260 may be threadedly engaged in the bottom of each bore 242, 244 for contact with the sealing rings in holes 232, 234-. These plugs 260 preferably are ground so as to be flush with the bottom surface of their respective type blocks.

The present invention will thus be seen to completely and effectively accomplish the objects enumerated hereinabove. It will be realized, however, that various changes and substitutions may be made to the specific embodiments disclosed herein for the purpose of illustrating the principles of this invention, without departing from these principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.

What is claimed is:

1. A mold blade construction comprising: a main body section having a longitudinally extending recess in the upper portion thereof, said section being of substantially uniform thickness at least throughout the length of said recess, an upper blade section slidably mounted in said recess for relative longitudinal movement between said main body section and said upper blade section, said upper blade section being of a substantially uniform thickness substantially equal to said thickness of said main body section, and a latching means detachably securing said upper blade section in a normal operating position relative to said main body section.

2. In a mold of the character described: a base; a pair of type blocks mounted on said base and defining a space therebetween of substantially uniform thickness; a mold blade slidably arranged in said space; cover plate means engaged over said type blocks and said blade; said blade comprising: a main body section having a longitudinally extending recess in the upper portion thereof, said section at least in the region of said recess being of substantially uniform thickness equal to said space between said type blocks; an upper blade section slidably mounted in said recess for longitudinal movement relative to said main body section, said upper blade section being of a substantially uniform thickness substantially equal to the thickness of said main body section, and a latching means detachably securing said upper blade section in a normal operating position relative to said main body section.

3. In a mold of the character described: a base plate; a squaring plate arranged on said base plate; a pair of generally rectangular type blocks arranged on said squaring plate and defining therebetween a narrow, elongated space for slidably receiving a mold blade; and means for cooling said mold, said means including: a pair of spaced passageways for cooling fluid arranged in said squaring plate; separate duct means extending through said base plate and opening into said passageways; passageways formed in said type blocks and including a section in each of said blocks of enlarged cross-sectional area disposed adjacent said space between said blocks; and said passageways in said type blocks being in communication with said passageways in said squaring plate.

4. The structure defined in claim 3 wherein said passageways in said type blocks and said squaring plate are constructed and arranged for series flow of cooling fluid therethrough.

5. The structure defined in claim 4 wherein said passageways in said squaring plate are parallel extending underneath :both of said type blocks and in directions substantially perpendicular to said space for receiving a mold blade.

6. A mold of the characer described comprising a base plate, a pair of type blocks arranged above said base plate and having oppositely facing planar side walls defining therebetween a space of substantially uniform thickness, a mold blade slidably mounted in said space, said type blocks having aligned front walls disposed perpendicular to said space, an upstanding flange on said 'base plate spaced from and substantially parallel to said front walls of said type blocks, arranged on said base a cross block slidably plate between the front walls of 11 said type blocks and said upstanding flange for movement parallel to said flange, and means maintaining said front walls in alignment providing for simultaneous adjusting movements of said type blocks relative to said base plate in a direction perpendicular to said front walls.

7. A mold of the character described comprising a base plate, a pair of type blocks arranged above said base plate and having oppositely facing planar side walls defining therebetween a space of substantially uniform thickness, a mold blade slidably mounted in said space, said type blocks having aligned front walls disposed perpendicular to said space, an upstanding flange on said base plate spaced from and substantially parallel to said front walls of said type blocks, a cross block slidably arranged on said base plate between the front walls of said type blocks and said upstanding flange for movement parallel to said flange, and means maintaining said front walls in alignment providing for separate adjusting movements of said type blocks relative to said base plate in a direction parallel to said front walls and simultaneous adjusting movements of said type blocks relative to said base plate in a direction perpendicular to said front walls.

8. A mold as defined in claim 7 wherein said adjusting means comprises an intermediate plate engaged to said base plate, said intermediate plate having an oblique groove in the top surface thereof, said type blocks having aligned transverse grooves formed in the bottom thereof extending parallel to the front walls thereof, and a guide key having an oblique lower portion slidably fed into said oblique groove and a straight upper portion slidably engaged in the transverse grooves in said type blocks.

9. A mold as defined in claim 7 wherein said mold blade comprises a main body section having a longitudinally extending recess in the upper portion thereof, said section being of substantially uniform thickness at least throughout the length of said recess, an upper blade section slidably mounted in said recess for relative movement between said main body section and said upper blade section, said upper blade section being of a substantially uniform thickness substantially equal to the thickness of said main body section, and latching means detachably securing said upper blade section in a normal operating position relative to said main body section.

10. A mold as defined in claim 9 wherein one of said type blocks has a lubricant passageway formed therein provided with an outlet opening communicating with said space, a fluid-pervious material arranged in said outlet opening and adapted to contact both sections of said mold blade for restricting the flow of lubricant from said passageway into said space, said mold blade main body section and upper blade section each having passage means therein for distributing lubricant from said outlet opening over the adjacent faces thereof and to the opposite faces thereof.

11. A mold as defined in claim 7 wherein said cross block includes a side surface slidably engaging said front walls of said type blocks, a roller carried by said cross block and engaging said upstanding flange, and means continuously urging said roller outwardly toward said flange.

12. A mold as defined in claim 11 wherein said cross block has one end of an arm pivoted to one end thereof for movement about a vertical axis, said roller being journaled on the central portion of said arrn about a vertical axis, said last mentioned means comprising a coil spring between the opposite end of said cross block and the adjacent end of said arm.

13. A mold of the character described comprising a base plate; a squaring plate arranged on said base plate; a pair of generally rectangular type blocks arranged on said squaring plate and defining therebetween a narrow elongated space, said type blocks having aligned front walls disposed perpendicular to said space, said squaring plate having a groove formed in the top thereof extending oblique to said front walls, said type blocks having grooves formed in the bottom thereof extending parallel with said front walls; a guide key having an oblique lower portion slidably engaged into said oblique groove and a straight upper portion slidably engaged in said type block grooves; means for fixedly securing said type blocks, said squaring plate, and said base plate together with said guide key in different positions of adjustment; a mold blade slidably mounted in said space, said mold blade including a main body section having a longitudinally extending recess in the upper portion thereof, an upper blade section slidably mounted in said recess, and latching means detachably securing said upper blade section in a normal operating position relative to said main body section; an upstanding flange of said base plate spaced from and substantially parallel to the front walls of said type blocks; a cross block slidably arranged on said base plate between said front walls and said upstanding flange for movement parallel to said flange, said cross block having a side surface slidably engaging said front walls; a roller carried by said cross block and engaging said upstanding flange; and means continuously urging said roller outwardly toward said flange.

14. A mold as defined in claim 13 wherein said squaring plate has a pair of spaced passageways for cooling fluid arranged therein, said base plate having separate duct means extending therethrough and opening into said passageways, said type blocks having passageways formed therein including a section in each of said type blocks of enlarged cross-sectional area disposed adjacent said space, said type block passageways being in communication with said squaring plate passageways.

15. A mold as defined in claim 14 wherein one of said type blocks has a lubricant passageway formed therein having an outlet opening communicating with said space, a fluid-pervious material arranged in said outlet opening and adapted to contact both sections of said mold blade for restricting the flow of lubricant from said lubricating passageway, each of said mold blade sections having passage means therein for distributing lubricant from said outlet opening over the adjacent face thereof and to the opposite face thereof.

16. In a mold of the character described: a base plate; a pair of type blocks arranged above said base plate and having aligned front walls; an upstanding flange on said base plate spaced from and substantially parallel to said front walls; a cross block slidably arranged on said base plate between said front walls and said flange for movement parallel to the latter, said cross block having a side surface slidably engaging said front walls; an arm having one end thereof pivoted to said cross block adjacent one end of said cross block for movement about a vertical axis; a roller journaled on the central portion of said arm for rotation about a vertical axis, said roller having its periphery extending laterally outwardly beyond the opposite side of said cross block for engagement with said upstanding flange; and spring means between said cross block and the opposite end of said arm for resiliently urging said arm and hence said roller outwardly toward said flange.

17. In a mold of the character described: a base plate; a pair of type blocks arranged above said base plate and defining therebetween a space of substantially uniform thickness; a mold blade slidably arranged in said space and of substantially the same width and height as said space, one of said type blocks having a lubricant passageway formed therein, said lubricant passageway having an outlet opening communicating with said space to feed lubricant to one face of said mold blade, said outlet opening having a fluid-pervious material disposed therein and adapted to contact said mold blade for restricting the flow of lubricant from said passageway into said space, said mold blade having passage means formed therein for distributing lubricant from said outlet opening over the adjacent face thereof and to the opposite face thereof.

18. The structure as defined in claim 17 wherein said passage means in said mold blade includes at least one groove in each face thereof and a hole extending through said mold blade in communication with said grooves.

19. In a mold or" the character described: a base plate; a pair of type blocks arranged above said base plate and defining therebetween a space adapted to slidably receive a mold blade; and means intermediate and operatively engaged to said type blocks and said base plate providing for adjusting movements of said type blocks in both transverse and longitudinal directions relative to said base plate, said adjusting means comprising an intermediate plate engaged to said base plate and having an oblique groove formed in the top thereof, said type blocks having transverse grooves formed in the bottom thereof, and a guide =key having an oblique lower portion slidably fed into said oblique groove and a straight upper portion slidably engaged in said transverse grooves.

20. The structure defined in claim 19 wherein manually operable means are provided adjacent each end of said guide key for moving said guide key in either direction in said oblique groove.

21. A mold blade construction comprising: a main body section having a longitudinally extending recess in the upper portion thereof, an upper blade section slidably mounted in said recess for relative longitudinal movement with respect to said main body section, a latch member pivoted to said upper blade section and having a lug thereon, said main body section having a notch formed therein for receiving said lug, spring means resiliently urging said latch member in a direction to engage said lug within said notch, and means on said latch member for pivoting the latter in a direction against the action of said spring means to disengage said lug from said notch.

22. In a mold of the character described: a base plate; a pair of type blocks arranged above said base plate and having aligned front walls; an upstanding flange on said base plate spaced from and substantially parallel to said front walls; a cross block slidably arranged on said base plate between said front Walls and said flange for movement parallel to the latter, said cross block having a side surface slidably engaging said front walls; means mounted on said cross block for movement toward and away from said flange; a roller journaled on said means for rotation about a vertical axis, said roller having its periphery extending laterally outwardly beyond the opposite side of said cross block for engagement with said upstanding flange; and spring means between said cross block and said means for resiliently urging the latter and hence said roller outwardly toward said flange.

References Cited in the file of this patent UNITED STATES PATENTS 1,219,956 Knight Mar. 20, 1917 2,029,529 Indahl Feb. 4, 1936 FOREIGN PATENTS 276,555 Great Britain Sept. 1, 1927 

